View source for 6wj2


==CryoEM structure of the SLC38A9-RagA-RagC-Ragulator complex in the pre-GAP state==
<StructureSection load='6wj2' size='340' side='right'caption='[[6wj2]], [[Resolution|resolution]] 3.20&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6wj2]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6WJ2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6WJ2 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.2&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GDP:GUANOSINE-5-DIPHOSPHATE'>GDP</scene>, <scene name='pdbligand=L8S:9-{5-O-[(S)-hydroxy{[(R)-hydroxy(thiophosphonooxy)phosphoryl]oxy}phosphoryl]-alpha-L-arabinofuranosyl}-3,9-dihydro-1H-purine-2,6-dione'>L8S</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=6wj2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6wj2 OCA], [https://pdbe.org/6wj2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6wj2 RCSB], [https://www.ebi.ac.uk/pdbsum/6wj2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6wj2 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/LTOR1_HUMAN LTOR1_HUMAN] As part of the Ragulator complex it is involved in amino acid sensing and activation of mTORC1, a signaling complex promoting cell growth in response to growth factors, energy levels, and amino acids. Activated by amino acids through a mechanism involving the lysosomal V-ATPase, the Ragulator functions as a guanine nucleotide exchange factor activating the small GTPases Rag. Activated Ragulator and Rag GTPases function as a scaffold recruiting mTORC1 to lysosomes where it is in turn activated. LAMTOR1 is directly responsible for anchoring the Ragulator complex to membranes. Also required for late endosomes/lysosomes biogenesis it may regulate both the recycling of receptors through endosomes and the MAPK signaling pathway through recruitment of some of its components to late endosomes. May be involved in cholesterol homeostasis regulating LDL uptake and cholesterol release from late endosomes/lysosomes. May also play a role in RHOA activation.<ref>PMID:19654316</ref> <ref>PMID:20381137</ref> <ref>PMID:20544018</ref> <ref>PMID:22980980</ref> 

==See Also==
*[[GTP-binding protein 3D structures|GTP-binding protein 3D structures]]
*[[Ragulator complex 3D structures|Ragulator complex 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Fromm SA]]
[[Category: Hurley JH]]